HT82M99AE HOLTEK [Holtek Semiconductor Inc], HT82M99AE Datasheet - Page 26

• Manufacturer Part Number: HT82M99AE
• Description: USB Mouse Encoder 8-Bit MCU
• Manufacturer: HOLTEK [Holtek Semiconductor Inc]

Clock Control Register - SCC
There is a system clock control register implemented to select the clock used in the MCU. This register consists of USB
clock control bit (USBCKEN), second suspend mode control bit (SUSPEND2) and system clock selection (SCLKSEL).
Table High Byte Pointer for Current Table Read - TBHP
Options
Note: The LVR voltage is define as 2.7V±0.3V and default is enable.
Rev. 1.00
Bit No.
Bit No.
2~0,
5
No.
10
2~0
1
2
3
4
5
6
7
8
9
3
4
6
7
WDT clock source: RC (system/4) (default: T1)
WDT clock source: enable/disable for normal mode (default: disable)
PA0~PA7 ,PB4, PB7 wake-up by bit (PA2, PA3 both wake-up by falling or rising edge)
(default: non wake-up)
PA0~PA7 pull-high by bit (default: Pull-high)
PB pull-high by nibble (default: Pull-high)
2.7 V (error 0.3V) LVR enable/disable (default: enable)
PA0~PA3, PB2, PB3 Pull-low by bit (default: non pull-low 30kW)
²CLR WDT², 1 or 2 instructions
TBHP enable/disable (default: disable)
PA output mode (CMOS/NMOS/PMOS) by bit (default: CMOS)
PGC2~PG0
PF2~PF0,
PF5
Label
Label
PF3
PF4
PF6
PF7
Read/Write
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
SUSPEND2
USBCKEN
SCLKSEL
PS2_flag
Option
Option
¾
¾
TBHP (0X1F) Register
SCC (0X1C) Register
Reserved
USB clock control bit. When set to ²1², indicates a USBCK ON,
else USBCK OFF. The default value is ²0².
When set to ²1², enables a 7.5kW resistor connected to D-pin
to 5V VDD. The default value is ²0².
System clock 6MHz or 12MHz option, when working on exter-
nal oscillator mode. The default value is ²0².
0: Operating at external 12MHz mode
1: Operating at external 6MHz mode
The default value is ²0².
This flag is used to show that the MCU is in PS2 mode (Bit=1).
This bit is R/W by FW and will be cleared to zero after power-on
reset. The default value is ²0².
Store current table read bit10~bit8 data
26
Option
HT82M99EE/HT82M99AE
Functions
Functions
February 8, 2006